EP 0264446 A4 19880817 - JOINT FOR OIL WELL PIPES AND METHOD OF MANUFACTURING SAME.
Title (en)
JOINT FOR OIL WELL PIPES AND METHOD OF MANUFACTURING SAME.
Title (de)
VERBINDUNG FÜR ÖLFELDROHRE UND VERFAHREN ZU SEINER HERSTELLUNG.
Title (fr)
JOINT POUR CANALISATIONS DE PUITS DE PETROLE ET METHODE POUR SA FABRICATION.
Publication
Application
Priority
JP 8600229 W 19860502
Abstract (en)
[origin: WO8706673A1] A joint for oil well pipes, which has a high galling resistance, and which is provided with a porous film of projection coating, which film is obtained by projecting, onto the outer surface of at least a metal seal portion of a joint for oil well pipes, particles of a soft metal, such as zinc or aluminum, especially, metal particles each of which consists of a nucleus of iron or an iron alloy, and a layer of zinc or a zinc alloy formed on the circumferential surface of the nucleus via a layer of an iron-zinc alloy; and a method of manufacturing the same joint.
IPC 1-7
IPC 8 full level
F16L 15/00 (2006.01); F16L 15/06 (2006.01); F16L 58/18 (2006.01); E21B 17/042 (2006.01)
CPC (source: EP US)
E21B 17/042 (2013.01 - EP US); F16L 15/00 (2013.01 - EP US); F16L 15/004 (2013.01 - EP US); F16L 58/182 (2013.01 - EP US)
Citation (search report)
- [A] US 4468309 A 19840828 - WHITE GERALD W [US]
- [A] US 3996398 A 19761207 - MANFREDI PIERRE
- [A] EP 0157587 A2 19851009 - SUMITOMO METAL IND [JP]
- [AD] US 4474651 A 19841002 - YAUCHI AKIHIRO [JP], et al
- See references of WO 8706673A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 8706673 A1 19871105; DE 3679196 D1 19910613; EP 0264446 A1 19880427; EP 0264446 A4 19880817; EP 0264446 B1 19910508; US 4871194 A 19891003
DOCDB simple family (application)
JP 8600229 W 19860502; DE 3679196 T 19860502; EP 86902903 A 19860502; US 14636787 A 19871231